officer killed, another critically injured in what amounted to your honor ban warfare, victims president obama remembered as he thanked the officers who were part of the investigation. >> we will determine what happened. we will investigate any associations these terrorists may have had, and we'll continue to do whatever we have to do to keep our people safe. >> reporter: officers and a community finally able to relax. >> it's a night where i think we're all going to rest easy. >> reporter: for thousands in the street tonight, that rest will just have to wait. in boston, nbc bay area news. >>> a million people terrorized by a single man considered to be extremely dangerous and on an unknown mission. just momentsing a, this picture released. the atf tells us, it shows authorities searching the 19 year old after his capture and after nearly 24 hours of being on the run. >> we're all taking cover behind the news vehicles. even the police are taking cover behind their cars. >> it was 10:30 on the east coast when an overrule was ambushed and killed. around 1:00 eastern standard time, police caught